So I was trying to figure out H.P. on my 1967 Cutlass Convertible.330 engine.
The code on the Block says 330001 LH
A website said that "L" means Low compression and "H" means 4 barrel.
I thought that all 67 Supreme's were High or Ultra high compression.I believe that would be a "G". Doe's anyone have a clue what the main difference is and is there a H.P. difference.I'm still trying to figure out what the horses are on this model.Would the vin no. give a clue? It's all original and has gold valve covers with Jetfire on them.It's a 2 speed Tranny.Also I think that's a 1 on the 6th digit.I'm sure "330" represents the engine size.I'm not sure about the "001"

Thanks from Chattanooga Tn.

 

Here's something that will help you. Page 0-4 http://wildaboutcarsonline.com/membe..._Section_0.pdf

 

Low comp 330- 2v - 250 hp Use this link.
330- 4v - 310hp
330- 4v HC - 320hp


http://www.442.com/oldsfaq/ofeng.htm

 

According to the 1967 Chassis Service Manual, there is no such suffix as "LH."
Just "E," "G," or "H."

No. US cars: 9, 10.25, or 10.5:1, export cars (banana republics): 8.5:1.

No.

You'd be wrong.
The first engine that year was 300001, they counted up from there.

It's the last three numbers of 330001, or the 3,000th 330 engine built in 1967.



- Eric

 

Agree on your assessment of "LH"
Wondering if he could have a car that was built in 66 for 67 that still had the L stamping for the L73 9.0 low compression engine? But then the numbering would be out of wack since it started with 001005.

Mudeye: go back and look at the engine stamping really carefully. Use the link I gave you to WAC to double check your numbers. That info is correct - it was published by Oldsmobile. The info you got elsewhere on the web could be anyones guess.

 

You guys are correct.I think I'm looking at the Exhaust Manifold.So I was not looking at the right numbers.Having said that.The code on the right side engine block i can't find.Maybe it's covered with sludge or something.Is it the right side as I'm facing the car? Or right as in sitting in the seat left and right? Also I found this stamped on the block back by the distributor CHG-BJ But have yet to find the 1 up front.
Thanks

 

Here is the factory illustration of the number's location:



And here is a photo showing it on an assembled engine - it's on the wire brushed pad just inboard of the alternator:



- Eric

 

Great pic Eric, shows much better than the CSM. Much easier to find and read than on 71/72. Wonder why they changed the stamping pad location when it was so easy to see

 

O'K Thanks Eric. It Says W332755 but I didn't see a letter suffix. Is it on the same stamp or somewhere else? Thanks

 

The earlier number was stamped on one head.
The later number was stamped on the block.

If the engine's been apart, all the earlier number will tell you is what engine that one head was originally on.

No suffix = 2bbl 10.25:1 standard motor (first "W" after the 6-cylinder "F's" on the chart).

• H = Optional Banana Republic 4bbl 8.3:1
• E = Optional Low Compression 2bbl 9:1
• G = Optional Standard Compression 4bbl 10.25:1
• Nothing = Standard 2bbl 10.25:1

- Eric

 

Harder to see on oil fill tube? That's where they moved to engine unit number to starting in '68. Ironically, neither location was actually on the block. Looking back now, "we" don't pay any attention to '68 and up engine unit numbers because they don't identify the engine as in previous years.
Allan, I believe what you are thinking of is the VIN derivative. And that was intentionally more hidden, as the mandate to have that on the engine (and trans) was theft control related.

 

O.K. Eric There was a wire covering the "G" W332755G And it has a 4 bbl
Valve covers are gold .Original engine. So is this H.C. or standard compression? (back to my thread question) And does this also indentify how much H.P.?
Thanks

 

320 hp 10.25:1 which is High Compression.

 

1967 W3•••••G engine number = optional 4bbl carb, 10.25:1 CR, 320 SAE gross HP.

Remember that SAE gross HP and SAE net HP are two different things - this motor probably made more like 250 to 275 net HP when new (others may have more accurate numbers)

- Eric

 

To further nail it down, this is what the Assembly Manual says (Section 6-1, page 103):



- Eric

 

I know this is an old thread but I found it in my search to figure out what motor is in my car . My problem is the stamping on my motor is a higher series # then all the literature and information posted. Mine reads W397193L any help appreciated and sorry if I am just being stupid and mis reading the information.

 

WxxxxxxL - "Low Compression Domestic L-73 Option" 4bbl, 9:1 CR, as per the 1966 CSM.

- Eric

 

Eric, thanks for the quick reply, my car is a 67 with a 66 motor then? Would it have come from factory like that or something changed over the years from previous owner.

Thanks,
Chris

 

Interesting thread. Checked my engine and says W090898 on the head. Why no number 3 as first digit? Was 1966 different?

 

Yes.

VIN-derivative engine numbers began in 1968, in accordance with new Federal regulations.
Numbers in 1966 corresponded to a completely different pattern, which is described in your Chassis Service Manual.

- Eric

 

Well I guess what I should have said was after reading the link provided by AllanR, I didn't find and W numbered engine starting with a 3. Granted it's a 1967 service manual, just thinking it might have carried over from 1966. I'll have to do more research.


OK, found it on TOCMP.